Manufacture of bead fillers



M. A. MARQUETTE.

MANUFACTURE OF-BEAD FILLERS Filed Jan 2"! 1921 lNJENTOR Meiww H, Marquette WWW- A t COEZPOEATION nrnn'orecronri or neon sincere.

Application January To a-ZZ whom it may; cmwem:

lie it known that I, liinnvori A. Menooerr. a, citizen of the United States of America, residing at Chicopee Fells, in the county of .Harnpden and diets of lllossecbiisetts, have invented certain new and useful improvements in the Manufacture of Bend Fillers, of which the following is specifi cetion.

My invention reloces to e. method end a. machine for making bead fillers, at once more tepid and cconi'imicel then methods end mechines now existing.

In former methods oil manufacturing bead fillers (which it will be understood signifies relatively hard rubber cores, usually covered with fabric, to be inserted in the bead edges of tire casings, psrticulerly those of the clincher type) the fillers have been made individually by 2. succession of individual operations. The rubber cores themselves were usually formed in an extrusion machine es 2. long rod of indefinite length. This rod was then either run through a covering machine, in which 2. strip or fabric was folded around the rod so as to completely enclose it; or was cut to length and rolled over a strip oi? fabric so as to cause the strip to be Wound upon the cut rod. Both of these methods deal with single elements at a. time, and have the disadvantage, besides their naturel slowness, 0i. requiring a. duplication of equipment in case the capacity demanded is greater than. that of a single unit.

It is the particular object of my invention to provide a method and a machine whereby it large number of head fillers may be constructed rapidly in a single operation; and my invention has added utility in cases where the bead fillers are to be covered with fabric, as by my improved mode of manulecture l are enabled to apply the fabric simulteneously by a single covering unit to a. plurality of bead fillers, and to do this in a continuous process with the formation of the need fillers themselves.

Briefly stated, my invention consists in melting a plurality of baud fillers in a Web or sheet in which the heed fillers are held together by thin webs of material, and then severing the Webs between the individual heed fillers. By this mode of procedure I ore. enabled to make a very large number of head fillers in the time previously required for the manufacture of a single filler. Fun thermore, if a. fabric covering upon the heed filler is desired, this mode of procedure permite of the application of the fabric substantially simultaneously with the formstion oi the fillers. ln practicing the invention I contemplate forming a wide sheet of rubber compound, of which the bead filler is memlyronstrocted, with ribs or corruge tions corresponding approximately to the shape of the heed fillers end joined together by thin websof rubber. This may conveniently be done by passing a mass of rubber through calender rolls presenting between them a plurality of grooves, or by eny other meens known or desired for forming rubber into shaped sheets, such as the usual tubing die. 'A sheet of fabric, usually biescut, is'

then pressed against each face of this web,

the fabric being preferably previously shaped to the form of the ribs. The ebly is now given a final forming promise, as by being pressed between soother of rolls having suit'oble forming'grooves.

Referring now to the preiemed embodimerit of my invention, it will be dribcd with perticular'reference to the eccomoenyin drawings, in which-- lg. 1 is e diegreinmetio end view of s' calender by which my invention rosy-be practiced;

Fig. 2 is a. perticl elevation thereof, looking from the right in F i 1;

Fig. 3 is a section on line 3-43 of Fig. 1; Fig. 4 is a section on line 4+4 of Fig. '1, also showing one manner in which the web beg con adjacent bead. fillers may be sav or Fig.5 is a section on line 5--5 of Fig. 1; Fig. 6 is esection on line 6-6 of Fl 1; Fig. 7 is a detail, on a larger scale, 0 one of the grooved r 115 shown in Fig. 2; and

Fig. 8 is a view similar to Fig. 1 showing a slightly modified construction.

A mass of rubber 10 is worked between cylinders or calender rolls 11 and 12 into a sheet 13 having longitudinal ribs 14 separated by thin Webs 15. These ribs are of substantially the shape of the final bead filler, and are held in sheet form by the webs. The cylinder, or calender roll. 12 is preferably smooth, so that the sheet 13 willv have a smooth surface 16, while the upper roll 11 has annular ,depressions 17 sepereei (is its piessiens,

mated by Web-forming pertioiis l8. Preferabiy, in order to insure that the sheet 13 will readily strip frem the eaiender roii, the sides 19 of the depressions are made similil'ig' as Shown in Fig. 7.

The heet so formed passed around a guide r011 20 spaced from the (.aieniiei so as t provide space to? 2b spool 21 {ZZU'F'Z/ii'g fsbi'ie (usueliy bias-cut), and is then, give seated between reii l2 and s i'eii 23 greeted in 2iv simiiiw manner ts roli ii. A second spoei 24: suppiies fabric 25 which is passed through a guide 26 presenting a hoiiew ,%:l1idi11g interior 2? constructed, as shown in L igs. It, and 6, so as to take the fabric sad fcld it to approximately the shape of tile unduieting surface of sh et 13. As sheet 13 passes between mils mend 23 it is coveppesite sides with fabric and .i'espeeti'weiy is pressed firmiy in this sssemhieti i'eietiei'i by the roiis. The PTOCL uct time fermeeii shown in Fig, i, and may be severed this eeint by cutters and 2 9 elem-1g Zines 3.. e? iiiey be vuicanized While stiii in the sheet fei'm. files the furthe? operations of biifiiiig and cementing, uses-Hy perfermeci. bef re the bead tiller is built-t inte :1 tire be carried out whiie the fiiieis stiii iii the assembled sheet 15mm, er" the iiilers may be separated first, es tlesiieti,

8 i have iiiustrated s. slight modifieetien of the method of procedure. Iik stead of forming r011 11 with annular de I employ a roll. 30 with a smooth sightiy spaced from reii 12 and c0- ectiiig therewith to produce a sheet 31 of substantieiiy uniform thickness. As this sheet passes ever r011 20 it is cut by a series of eutters inte strips 33 of sufficicnt cross seetienai area 'te iiii the space between the eppceeci fabric sheets as these between the r0115 12 and which (11". of thee same eoiistr'uei-ion in the preferred method. In this latter case the bead wili be held. in their sheet er web farm by the fabric extending between them, and they may be either: severed directly after foi'inatien 02. may be treated in any desires we as by Yuiceniw ing, ieuifing or cementing before being cut inte separate tillers.

'Heving time described. my iiwention claim;

1. An intermediate product in the menufaeture of clincher bead fillers eonsistiug of a, plurality of substantieiiy parallel bead fiilers held in position one to another by their outer fabric covering.

2, An intermediate product in the manufracture of separate ciinchei bead fiiless comprising a plurality of substantially formed bead fillers helci in their purallei relation by thin webs of material.

3. A head tiller having one fiat end onearched surface in which one mece of fabric v i i ,ez eses no and one fabric covering the fist side of the fii'i' (i second piece (it fabric cevci'in ii i ,ned surmise said strips ati'mding space bet-ii evei'flow 0i. excess msterisi 0f the filler.

The methc-d of making bead .iiQiE; eemprising termin sheet having perziilei ribs substzintisiiy corresponding in Outline t0 the bead iiiiei's and thin Webs 0% me teiiei connecting the ribs and severing the webs betweei'i the ribs to form separate bead fillers.

5. A bead melting PYUCQSS consisting in forming :1 plurality of substeit tieliy psraiiel rows of beads having their surfaces covered with centinueus sheets of febrici 7 it messes of tormiiig besti .i'iiler: cam-- prising forming iubber'into the apprenmate shape of a piursiity of zifec nt; be'zici fiiie 's, covering the i'izbber with opposed of. febyic, anti severing the fabric betw en the adjacent bead fiiieis.

8. A pieces-is of tormi head fliers cemi'oiii'iiiig into the app? mete shape 01 a pluieiity ei' sijeceiit bees; fiilei's having the sides thereof dispeseci substantiaiiy in the same piane, cave/ring said fiat with e continuous sheet ef fabric, iteiding substantieiiy cenfomi to feces of the adjacent bead iiiiers, eppiying said second sheet t0 such opposing surfaces and severing the material between adjaceiit fillers.

9. A pi'ecess of forming bead tiilei's, cempi'ising foi'i'r ing rubber iiite the approximate shape of :i piflttz itji 0f etijaeeiit bead fillers, ccvering the rubber with epposeti them the item. the bed the epposing sursecond sheet at fabric tesheets of fabric, fsi'mmg the eembineci mi her and fabric into adjacent bead fiilei's united by fabric, e116. sx-rering the fabi'ic between the adjacent seatitillers 10. itpi'eeess farming beefiiiiiers, eem prising fer-mil mm the sppr'eximete shape oi a pier-aim 0 adjacent beet}. fillers having the sides tiiereef dispeseci subswntiaiiy in the same Line cevering said tint sides with eeiitinuuiis 51 :t (if fabric. {aiding :2 sees-xiii 0f f ie substantially COI'ifOKHE the epposing surfaces of tile adjacent beeti fiiiers, appiying said second sheet to such epnesiii'g' surfaces, forming the combined Klii) and fabric to substantially final shape, and severing the material between fillers:

11. In a bead ms? marinev e c0mtiination 0i. means fer a rubber sheet means for leading tee 21" sheet, tiiiu hem? termin (Hives w t two i'eiiers, means for supplying; and resting its/brie 5 nation of means for forming a rubber sheet having longitudinal ribs separated by relatively thin ebs, means for leading the rub ber sheet thru bead forming grooves between two rollers, means for supplying and 10 directing fabric sheets between the grooved rolls and the rubber strips, and means for cutting between the parallel beads so formed.

13. In a bead making machine, a combi' nation of two cylinders one of which has plurality of parallel grcoves on its surface,-

means for leading rubber thru said grooves,

and means for supplying a sheet of fabric between the rubber and each roller.

MELVON A. MARQUETTE. 

